41487-00-7Relevant academic research and scientific papers
Glycopeptide Synthesis: Selective C-terminal Deblocking and Peptide Chain Elongation of Glucosylserine Derivatives
Buchholz, Michael,Kunz, Horst
, p. 1859 - 1885 (2007/10/02)
Benzyloxycarbonyl-(Z-)serine 2-bromoethyl ester (3b) reacts with 2,3,4,6-tetra-O-benzoyl-α-D-glucopyranosyl bromide (14) to give the glucosylserine ester 15.After conversion into the corresponding 2-iodoethyl ester 23 the carboxylic group is deblocked selectively by reductive elimination using zinc.In this procedure the Z and the carbohydrate protective functions as well as the sensitive O-glycoside bond remain unaffected.The glycosylserine 24 is condensed with amino acid 2-bromoethyl esters 2 to form protected glycodipeptide 2-bromoethyl esters 18 which are extended to give glycotripeptide esters 25 after selective carboxyl deblocking.Whereas protected serine dipeptides 5 are glycosylated with 14 to form the conjugates 18, the glycosylation of the serine tripeptides 10 was not successful.
Studies of Bitter Peptides from Casein Hydrolyzate. II. Syntheses of Bitter Peptide Fragments and Analogs of BPIa (Arg-Gly-Pro-Pro-Phe-Ile-Val) from Casein Hydrolyzate
Otagiri, Ken,Miyake, Ichizo,Ishibashi, Norio,Fukui, Hiroshi,Kanehisa, Hidenori,Okai, Hideo
, p. 1116 - 1119 (2007/10/02)
In order to investigate the relationship between bitterness and chemical structure of BPIa, eleven kinds of fragments and analogs of BPIa were synthesized. des-Gly2-BPIa and des-Pro4-BPIa exhibited extremely bitter taste. However, the pentapeptide (Arg-Gly-Pro-Pro-Phe) of BPIa possessed weak bitterness. The bitterness exhibition of BPIa probably derived from the spatial structure of its molecule.
